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choonkending/option-function-annotation-in-flow.md

Last active June 4, 2017 13:04
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option-function-annotation-in-flow.md
Some(x) None
map map<V>(f: (value: U) => V): Some<V> map<V>(f: (value: U) => V): None<V>
flatMap flatMap<V>(f: (value: U) => Option<V>): Option<V> flatMap<V>(f: (value: U) => Option<V>): None<V>
fold fold<V>(ifEmpty: () => V, f: (value: U) => V): V fold<V>(ifEmpty: () => V, f: (value: U) => V): V
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